Vehicular heat generators and viscous fluids for the same

摘要

PCT No. PCT/JP97/01948 Sec. 371 Date Feb. 5, 1998 Sec. 102(e) Date Feb. 5, 1998 PCT Filed Jun. 9, 1997 PCT Pub. No. WO97/47487 PCT Pub. Date Dec. 18, 1997As a viscous fluid (F) contained in a vehicular heat generator provided with a rotor (33), a non-Newtonian fluid having an apparent viscosity that decreases as the shear rate of the rotor (33) increases (e.g., a kind of silicone oil) is employed. The nominal viscosity of the viscous fluid (F) is in the range of 10,000 cSt to 200,000 cSt. If such viscous fluid is employed, the viscous fluid (F) maintains its shear heat generating function over an extended period even under circumstances where the fluid (F) is subjected to over-shearing by over-rotation of the rotor (33). In addition, low-temperature starting of the rotor is facilitated.